feat: complete policy parity

[pentatonick]

Summary

• Complete policy parity work

Test plan

• cargo fmt --all --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo build --workspace --all-targets
• cargo test --workspace

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 78.79464% with 95 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/geometry-strategy/src/compare.rs	77.44%	76 Missing ⚠️
crates/geometry-overlay/src/validity.rs	82.88%	19 Missing ⚠️

📢 Thoughts on this report? Let us know!